Factor the perfect square trinomial completely.x2 - 10xy + 25y2
A. (x - 5y)(x + 5y)
B. (x + 5y)2
C. (x - 5y)2
D. prime
Answer: C
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 7x, y = - 
, x = 1
A. 
?
B. 
?
C. 
?
D. 50?
Determine where the graph of f(x) = ln |x?4| is concave upward and where it is concave downward. Also, find all inflection points of the function.
What will be an ideal response?
Solve the problem.A simplified economy is based on agriculture, manufacturing, and transportation. Each unit of agricultural output requires 
of its own output, 0.5 of manufacturing, and 
of transportation output. Each unit of manufacturing output requires 
of its own output, 0.1 of agricultural, and 
of transportation output. Each
unit of transportation output requires 
of its own output, 0.2 of agricultural, and 0.1 of manufacturing output. There is demand for 
of agricultural, 
of manufacturing, and 
of transportation output. How many units should each segment of the economy produce?
What will be an ideal response?
Find the sum of the sequence.
A. 18 B. 20 C. 30 D. 14